TWI523335B - Antenna device and communication device - Google Patents
Antenna device and communication device Download PDFInfo
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- TWI523335B TWI523335B TW100142820A TW100142820A TWI523335B TW I523335 B TWI523335 B TW I523335B TW 100142820 A TW100142820 A TW 100142820A TW 100142820 A TW100142820 A TW 100142820A TW I523335 B TWI523335 B TW I523335B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Near-Field Transmission Systems (AREA)
- Details Of Aerials (AREA)
Description
本發明係關於一種藉由在對向之一對電極間之電磁場耦合進行資訊通訊之天線裝置及組裝有該天線裝置之通訊裝置。The present invention relates to an antenna device for communicating information by electromagnetic field coupling between opposite counter electrodes and a communication device incorporating the antenna device.
本申請係以2010年12月1日在日本申請之日本發明專利申請特願2010-268395號為基礎主張優先權，參照該等申請並將其內容援引至本申請。The present application claims priority on the basis of Japanese Patent Application No. 2010-268395, filed on Jan.
近年來，藉由電磁感應收發訊號之非接觸通訊技術已確立，利用為交通系統車票或電子貨幣之傾向逐漸增加。又，此種非接觸通訊功能亦有裝載於行動電話之傾向，因而期待今後之蓬勃發展。不僅以電磁感應進行之近接通訊，在物流可相隔數m之距離讀寫之IC標籤亦已產品化。又，此種非接觸通訊技術不僅能以非接觸方式進行通訊，亦可同時進行電力傳送，因此亦可構裝於本身不具備電池等電源之IC卡。In recent years, non-contact communication technology for transmitting and receiving signals by electromagnetic induction has been established, and the tendency to use tickets for transportation systems or electronic money has gradually increased. Moreover, such a non-contact communication function also has a tendency to be mounted on a mobile phone, and is expected to flourish in the future. Not only the proximity communication by electromagnetic induction, but also the IC tag for reading and writing at a distance of several m from the logistics has been commercialized. Moreover, such a non-contact communication technology can not only communicate in a non-contact manner, but also perform power transmission at the same time, and thus can be constructed in an IC card that does not have a power source such as a battery.
作為適用此種非接觸通訊技術之RFID(Radio Frequency Identification)用之天線模組，一直以來使用以下所示之數種。第一，有使用FPC(Flexible Printed Circuit)或硬性基板將線圈圖案製作在平面上之天線模組。第二，有將園線作成繞阻而製作線圈之天線模組。第三，將FPC或FFC(Flexible Flat Cable)作成線束，將該線束作成環狀而形成線圈之天線模組。As an antenna module for RFID (Radio Frequency Identification) to which such a contactless communication technology is applied, the following types have been used. First, there is an antenna module in which a coil pattern is formed on a plane using an FPC (Flexible Printed Circuit) or a rigid substrate. Second, there is an antenna module in which a coil is formed by winding a circular line. Thirdly, an FPC or an FFC (Flexible Flat Cable) is formed as a wire harness, and the wire harness is formed into a ring shape to form an antenna module of the coil.
上述天線模組係藉由考量零件之配置、形狀之設計而適當地選擇並組裝於電子機器使用。The antenna module is appropriately selected and assembled for use in an electronic device by considering the arrangement of the components and the design of the shape.
在電子機器內配置天線模組之情形，由於電子機器之金屬製筐體或使用於內部零件之金屬之影響，無法將從讀寫器振盪之磁場高效率地引入天線線圈。為了不受到此種金屬之影響，在天線模組，將透磁率較高且損耗係數較小之肥粒鐵製之磁性片安裝在天線之周邊。In the case where the antenna module is disposed in an electronic device, the magnetic field oscillated from the reader/writer cannot be efficiently introduced into the antenna coil due to the influence of the metal casing of the electronic device or the metal used for the internal component. In order to not be affected by such a metal, in the antenna module, a magnetic piece made of ferrite iron having a high magnetic permeability and a small loss coefficient is mounted around the antenna.
例如在圖12，從左至右依序分別顯示天線線圈單體之電感、使金屬體接近後之天線線圈之電感、在天線線圈與金屬體之間配置有磁性片時之天線線圈之電感。For example, in FIG. 12, the inductance of the antenna coil unit, the inductance of the antenna coil after the metal body is approached, and the inductance of the antenna coil when the magnetic sheet is disposed between the antenna coil and the metal body are sequentially displayed from left to right.
以上述方式，藉由將磁性良好之肥粒鐵製之磁性片配置成重疊於天線模組，可防止磁場進入配置在天線模組之周圍之金屬內而成為渦電流並轉換成熱。又，肥粒鐵製之磁性片，進行形狀或組合等之最佳化以獲得良好之通訊性能。又，為了謀求行動電話等可攜式電子機器之薄型化，較佳為，天線模組在與肥粒鐵製之磁性片貼合之狀態下，僅可能使其變薄。In the above manner, by arranging the magnetic sheets made of ferrite grains with good magnetic properties so as to be superposed on the antenna module, it is possible to prevent the magnetic field from entering the metal disposed around the antenna module and becoming an eddy current and converting it into heat. Moreover, the magnetic sheets made of ferrite grains are optimized in shape or combination to obtain good communication performance. Moreover, in order to reduce the thickness of a portable electronic device such as a mobile phone, it is preferable that the antenna module is only thinned in a state in which it is bonded to a magnetic piece made of ferrite.
又，在適用此種非接觸通訊之通訊系統，為了在讀寫器與非接觸資料載體之間進行非接觸通訊與電力傳送，將諧振用電容器連接於環狀天線，藉由使以f=1/(2π(LC)1/2)表示之諧振頻率與系統之規定頻率一致，進行讀寫器與非接觸資料載體之穩定通訊，使通訊距離為最大。藉由環狀天線與諧振用電容器之特性決定之L、C具有複數個變動因素，不一定會成為假設值。例如，在以13.56[MHz]為規定頻率且作為交通系統車票或電子貨幣之用途之通訊系統，從可靠性之觀點而言，即使受到上述變動因素之影響，亦要求要將天線模組之諧振電路之諧振頻率控制在13.56[MHz]±200[KHz]程度。Further, in a communication system to which such contactless communication is applied, in order to perform contactless communication and power transmission between the reader/writer and the non-contact data carrier, a resonance capacitor is connected to the loop antenna by f=1 /(2π(LC) 1/2 ) indicates that the resonant frequency is consistent with the specified frequency of the system, and the stable communication between the reader and the non-contact data carrier is performed to maximize the communication distance. L and C, which are determined by the characteristics of the loop antenna and the capacitor for resonance, have a plurality of fluctuation factors, and do not necessarily have a hypothetical value. For example, in a communication system using 13.56 [MHz] as a prescribed frequency and used as a transportation system ticket or electronic money, from the viewpoint of reliability, even if it is affected by the above-mentioned variation factors, the resonance of the antenna module is required. The resonant frequency of the circuit is controlled to the extent of 13.56 [MHz] ± 200 [KHz].
此處，在非接觸資料載體，為了低成本，環狀天線係以銅箔圖案製作，因圖案寬度之偏差等使L之值變化。若觀察由一般晶片電容器之特性決定之C與由天線線圈之特性決定之L分別之溫度變化率，則會有L相對於C之偏差在等級上成為100倍程度之情形。例如，在L之值在2.5[μH]位移1%之情形，由於諧振頻率偏差70KHz，因此較佳為儘可能相對L值之溫度不變動。Here, in the non-contact data carrier, the loop antenna is made of a copper foil pattern for low cost, and the value of L is changed due to variations in pattern width or the like. When the temperature change rate of C determined by the characteristics of the general chip capacitor and L determined by the characteristics of the antenna coil is observed, the deviation of L from C is 100 times in the level. For example, in the case where the value of L is shifted by 1% at 2.5 [μH], since the resonance frequency deviation is 70 kHz, it is preferable that the temperature as far as possible relative to the L value does not fluctuate.
專利文獻1揭示一種通訊裝置，該通訊裝置為了防止上述起因於溫度變化導致諧振頻率變動，具備溫度檢測部、及依據該溫度檢測檢測出之溫度使在同調部同調之諧振頻率偏移之頻率偏移。Patent Document 1 discloses a communication device that includes a temperature detecting unit and a frequency offset of a resonance frequency shift in which the coherence unit is coherent in accordance with a temperature detected by the temperature detection unit in order to prevent the resonance frequency from varying due to a temperature change. shift.
專利文獻1：日本特開2007-104092號公報Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-104092
又，天線線圈之電感之溫度特性亦根據配置在與製作有天線線圈之基板接近之位置之磁性片之組成而變化。此處，圖13係顯示將由組成不同之二個肥粒鐵磁性材料KM11,KM21構成之各磁性片貼合在製作有天線線圈之印刷基板之各天線模組之電感之溫度特性。在此圖13，顯示相對以橫軸為溫度且以縱軸為設計中心之一例而設定之20℃時之電感L20之溫度變化所伴隨之電感Lx之差分之比率(Lx-L20)×100/L20之值。Further, the temperature characteristic of the inductance of the antenna coil also changes depending on the composition of the magnetic sheet disposed at a position close to the substrate on which the antenna coil is formed. Here, FIG. 13 shows the temperature characteristics of the inductance of each of the antenna modules in which the magnetic sheets composed of the two ferrite-grained ferromagnetic materials KM11 and KM21 having different compositions are bonded to the printed circuit board on which the antenna coil is formed. In this FIG. 13, the ratio (Lx-L20) × 100/ of the difference of the inductance Lx accompanying the temperature change of the inductance L20 at 20 ° C which is set with the horizontal axis as the temperature and the vertical axis as the design center is shown. The value of L20.
若觀察圖13，則在各磁性片，在-20℃至60℃之溫度區域，相對設計中心之20℃時之電感L20，分別最大偏移1.0%、2.0%程度，其結果，具有諧振頻率大幅偏移之問題。When FIG. 13 is observed, in each of the magnetic sheets, the inductance L20 at 20 ° C of the design center is shifted by 1.0% and 2.0%, respectively, in the temperature range of -20 ° C to 60 ° C, and as a result, the resonance frequency is obtained. The problem of large offsets.
對於此種溫度特性，上述專利文獻1記載之通訊裝置，由於以電路對策進行頻率修正處理，因此不易內設在例如行動電話等要求小空間之電子機器。With regard to such a temperature characteristic, the communication device described in Patent Document 1 is not easily built in an electronic device requiring a small space such as a mobile phone because the frequency correction process is performed by the circuit countermeasure.
本發明係有鑑於上述問題而構成，其目的在於提供一種不使裝置整體之空間變大、即使溫度變化亦可將諧振頻率維持成大致一定而穩定地進行通訊之天線裝置及組裝有該天線裝置之通訊裝置。The present invention has been made in view of the above-described problems, and an object of the invention is to provide an antenna device that can stably communicate with a resonance frequency without substantially increasing the space of the entire device, and that can be stably connected even if the temperature is changed. Communication device.
作為用以解決上述問題之手段，本發明之天線裝置，具備：諧振電路，具有接受從發訊器以既定振盪頻率發射之磁場之天線線圈與和天線線圈電氣連接之電容器，與發訊器感應耦合而成為可通訊；以及磁性片，形成在與天線線圈重疊之位置，使天線線圈之電感變化；天線線圈具有電感因溫度變化而變化之溫度特性；磁性片係由以與既定使用溫度區域之溫度變化所伴隨之天線線圈之電感之變化成為相反特性之方式使天線線圈之電感變化且在使用溫度區域使諧振電路之諧振頻率與振盪頻率大致一致之溫度特性之磁性材料構成。As means for solving the above problems, the antenna device of the present invention includes: a resonance circuit having an antenna coil that receives a magnetic field emitted from a transmitter at a predetermined oscillation frequency and a capacitor electrically connected to the antenna coil, and a sensor is sensed Coupling to become communicable; and the magnetic sheet is formed at a position overlapping the antenna coil to change the inductance of the antenna coil; the antenna coil has a temperature characteristic in which the inductance changes due to temperature change; and the magnetic sheet is used for a predetermined temperature range The change in the inductance of the antenna coil due to the change in temperature is such that the inductance of the antenna coil changes and the temperature characteristic of the resonant circuit is such that the resonant frequency of the resonant circuit substantially matches the oscillation frequency.
又，本發明之通訊裝置，具備：諧振電路，具有接受從發訊器以既定振盪頻率發射之磁場之天線線圈與和天線線圈電氣連接之電容器，與發訊器感應耦合而成為可通訊；磁性片，形成在與天線線圈重疊之位置，使天線線圈之電感變化；以及通訊處理部，藉由流至諧振電路之電流驅動，在與發訊器之間進行通訊；天線線圈具有電感因溫度變化而變化之溫度特性；磁性片係由以與既定使用溫度區域之溫度變化所伴隨之天線線圈之電感之變化成為相反特性之方式使天線線圈之電感變化且在使用溫度區域使諧振電路之諧振頻率與振盪頻率大致一致之溫度特性之磁性材料構成。Further, the communication device of the present invention includes: a resonance circuit having an antenna coil that receives a magnetic field emitted from a transmitter at a predetermined oscillation frequency and a capacitor electrically connected to the antenna coil, and inductively coupled to the transmitter to be communicable; magnetic a chip formed at a position overlapping the antenna coil to change an inductance of the antenna coil; and a communication processing unit that is driven by a current flowing to the resonant circuit to communicate with the transmitter; the antenna coil has an inductance due to temperature change And the temperature characteristic of the change; the magnetic sheet changes the inductance of the antenna coil in such a manner that the change in the inductance of the antenna coil accompanying the temperature change of the predetermined use temperature region, and the resonance frequency of the resonance circuit in the use temperature region It is composed of a magnetic material having a temperature characteristic substantially equal to the oscillation frequency.
本發明，將具有以與既定使用溫度區域之溫度變化所伴隨之天線線圈之電感之變化成為相反特性之方式使天線線圈之電感變化且在使用溫度區域使諧振電路之諧振頻率與振盪頻率大致一致之溫度特性之磁性片形成為重疊在天線線圈。以上述方式，本發明，藉由與磁性片之溫度特性對應之天線線圈之電感之變化使與溫度變化對應之天線線圈之電感之變化導致之諧振頻率之變化抵銷。藉此，本發明，由於未以電路對策進行頻率修正處理，因此不使裝置整體之空間變大，即使溫度在預先設定之使用溫度區域變化亦可將諧振頻率維持成大致一定而穩定地進行通訊。According to the present invention, the inductance of the antenna coil is changed so as to have an opposite characteristic to the change in the inductance of the antenna coil accompanying the temperature change in the predetermined use temperature region, and the resonance frequency of the resonance circuit is substantially coincident with the oscillation frequency in the use temperature region. The magnetic sheet of the temperature characteristics is formed to overlap the antenna coil. In the above manner, according to the present invention, the change in the inductance of the antenna coil corresponding to the temperature characteristic of the magnetic sheet cancels the change in the resonance frequency caused by the change in the inductance of the antenna coil corresponding to the temperature change. According to the present invention, since the frequency correction processing is not performed by the circuit countermeasure, the space of the entire device is not increased, and the resonance frequency can be maintained substantially constant even when the temperature is changed in the predetermined use temperature region. .
以下，參照圖式詳細說明用以實施本發明之形態。此外，本發明並不限於以下實施形態，理所當然，在不脫離本發明之要旨範圍內，可進行各種變更。Hereinafter, embodiments for carrying out the invention will be described in detail with reference to the drawings. It is to be understood that the invention is not limited thereto, and various modifications may be made without departing from the spirit and scope of the invention.
(整體構成)(overall)
適用本發明之天線模組，係利用在與發射電磁波之發訊器間所產生之電磁感應而成為可通訊狀態之天線裝置，其係組裝於例如圖1所示之RFID(Radio Frequency Identification，射頻識別)用之無線通訊系統100而使用。The antenna module to which the present invention is applied is an antenna device that is in a communicable state by electromagnetic induction generated between a transmitter that emits electromagnetic waves, and is assembled in, for example, an RFID (Radio Frequency Identification) as shown in FIG. It is used by the wireless communication system 100.
無線通訊系統100，係由適用本發明之天線模組1、及進行對天線模組1之存取之讀寫器2所構成。The wireless communication system 100 is composed of an antenna module 1 to which the present invention is applied, and a reader/writer 2 that performs access to the antenna module 1.
讀寫器2，具備：天線2a，作為用以對天線模組1發射磁場之發訊器，具體而言，朝天線模組1發射磁場；及控制基板2b，係與經由天線2a而感應耦合之天線模組1進行通訊。The reader/writer 2 includes an antenna 2a as a transmitter for transmitting a magnetic field to the antenna module 1, specifically, a magnetic field is emitted toward the antenna module 1, and a control substrate 2b is inductively coupled via the antenna 2a. The antenna module 1 communicates.
即，讀寫器2，配設有與天線2a電氣連接之控制基板2b。在該控制基板2b，構裝有由1個或複數個積體電路晶片等電子零件所構成之控制電路。該控制電路，根據從天線模組1接收之資料，執行各種處理。例如，控制電路，在將資料寫入天線模組1時，將資料編碼，根據編碼後之資料，進行既定頻率(例如13.56MHz)之載波之調變，然後將調變後之調變訊號放大，以放大後之調變訊號驅動天線2a。又，控制電路，在從天線模組1讀出資料時，將以天線2a接收之資料之調變訊號放大，將放大後之資料之調變訊號解調，然後將解調後之資料解碼。又，控制電路，係使用一般之讀寫器所使用之編碼方式及調變方式，例如，使用曼徹斯特(Manchester)編碼方式或ASK(Amplitude Shift Keying，振幅移位鍵控)調變方式。That is, the reader/writer 2 is provided with a control board 2b electrically connected to the antenna 2a. A control circuit composed of one or a plurality of electronic components such as integrated circuit chips is mounted on the control board 2b. The control circuit performs various processes based on the data received from the antenna module 1. For example, when the data is written into the antenna module 1, the control circuit encodes the data, performs modulation of the carrier of the predetermined frequency (for example, 13.56 MHz) according to the encoded data, and then amplifies the modulated modulated signal. The antenna 2a is driven by the amplified modulation signal. Moreover, when the data is read from the antenna module 1, the control circuit amplifies the modulated signal of the data received by the antenna 2a, demodulates the modulated signal of the amplified data, and decodes the demodulated data. Further, the control circuit uses a coding method and a modulation method used by a general reader/writer, and for example, a Manchester coding method or an ASK (Amplitude Shift Keying) modulation method is used.
組裝於電子機器之筐體3內部之天線模組1，具備：天線電路11，構裝有能在與感應耦合之讀寫器2間進行通訊之天線線圈11a；磁性片12，為將磁場導入天線線圈11a而形成於與天線線圈11a重疊之位置；及通訊處理部13，係藉由流過天線電路11之電流驅動，在與讀寫器2之間進行通訊。The antenna module 1 assembled in the casing 3 of the electronic device includes an antenna circuit 11 and an antenna coil 11a capable of communicating between the inductively coupled reader/writer 2, and a magnetic sheet 12 for introducing a magnetic field The antenna coil 11a is formed at a position overlapping the antenna coil 11a, and the communication processing unit 13 is driven by a current flowing through the antenna circuit 11, and communicates with the reader/writer 2.
天線電路11，係相當於本發明之諧振電路之電路，具備天線線圈11a及與天線線圈11a電氣連接之電容器11b。The antenna circuit 11 is a circuit corresponding to the resonant circuit of the present invention, and includes an antenna coil 11a and a capacitor 11b electrically connected to the antenna coil 11a.
天線電路11，在以天線線圈11a接收到從讀寫器2發射之磁場後，則與讀寫器2藉由感應耦合而形成磁耦合，接收調變後之電磁波，然後將接收訊號供應至通訊處理部13。After receiving the magnetic field emitted from the reader/writer 2 by the antenna coil 11a, the antenna circuit 11 forms a magnetic coupling with the reader/writer 2 by inductive coupling, receives the modulated electromagnetic wave, and then supplies the received signal to the communication. Processing unit 13.
磁性片12，為將從讀寫器2發射之磁場導入天線線圈11a而形成於與天線線圈11a重疊之位置，相較於沒有該磁性片12之情形，變化成天線線圈11a之電感增加。具體而言，磁性片12設成如下構造，為抑制設於可攜式電子機器之筐體3內部之金屬零件使從讀寫器2發射之磁場散射或產生渦電流，因而將其貼合於磁場釋放方向之相反側。The magnetic sheet 12 is formed at a position where the magnetic field emitted from the reader/writer 2 is introduced into the antenna coil 11a and overlaps with the antenna coil 11a. The inductance of the antenna coil 11a is increased as compared with the case where the magnetic sheet 12 is not provided. Specifically, the magnetic sheet 12 is configured to prevent the magnetic field emitted from the reader/writer 2 from scattering or generating an eddy current by suppressing the metal member provided inside the casing 3 of the portable electronic device, thereby bonding it to The opposite side of the direction in which the magnetic field is released.
通訊處理部13，係藉由流過電氣連接之天線電路11之電流驅動，在與讀寫器2間進行通訊。具體而言，通訊處理部13，將接收到之調變訊號解調，將解調後之資料解碼，然後將解碼後之資料寫入至後述記憶體133。又，通訊處理部13，將待傳送至讀寫器2之資料從記憶體133讀出，將已讀出之資料編碼，根據編碼後之資料將載波調變，經由利用感應耦合而形成磁耦合之天線電路11，將調變後之電波傳送至讀寫器2。The communication processing unit 13 is driven by the current flowing through the electrically connected antenna circuit 11 to communicate with the reader/writer 2. Specifically, the communication processing unit 13 demodulates the received modulated signal, decodes the demodulated data, and then writes the decoded data to the memory 133 described later. Further, the communication processing unit 13 reads the data to be transmitted to the reader/writer 2 from the memory 133, encodes the read data, modulates the carrier based on the encoded data, and forms a magnetic coupling by using inductive coupling. The antenna circuit 11 transmits the modulated radio waves to the reader/writer 2.
參照圖2說明以上構成之無線通訊系統100中，天線模組1之天線電路11之具體電路構成。The specific circuit configuration of the antenna circuit 11 of the antenna module 1 in the wireless communication system 100 constructed as above will be described with reference to FIG.
如上述，天線電路11具備天線線圈11a與電容器11b。As described above, the antenna circuit 11 includes the antenna coil 11a and the capacitor 11b.
天線線圈11a係例如形成為矩形，依據由讀寫器2之天線2a放射之磁通之中、與天線線圈11a交鏈之磁通之變化產生反電動勢。電容器11b與天線線圈11a連接而構成諧振電路。The antenna coil 11a is formed, for example, in a rectangular shape, and a counter electromotive force is generated in accordance with a change in the magnetic flux that is interlinked with the antenna coil 11a among the magnetic fluxes radiated from the antenna 2a of the reader/writer 2. The capacitor 11b is connected to the antenna coil 11a to constitute a resonant circuit.
如上述，天線電路11中，天線線圈11a與電容器11b電氣連接，構成諧振電路，藉由天線線圈11a之電感L及電容器11b之電容C設定以f=1/(2π(LC)1/2)表示之諧振頻率。As described above, in the antenna circuit 11, the antenna coil 11a and the capacitor 11b are electrically connected to each other to constitute a resonance circuit, and the inductance L of the antenna coil 11a and the capacitance C of the capacitor 11b are set to f = 1 / (2π(LC) 1/2 ). Represents the resonant frequency.
通訊處理部13係藉由具備調變/解調電路131、CPU 132、記憶體133之微電腦構成。The communication processing unit 13 is configured by a microcomputer including a modulation/demodulation circuit 131, a CPU 132, and a memory 133.
調變/解調電路131進行產生使從天線電路11送出至讀寫器2之資料重疊於載波之調變波之調變處理。又，調變/解調電路131進行從讀寫器2所輸出之調變波取出資料之解調處理。The modulation/demodulation circuit 131 performs a modulation process for generating a modulated wave in which data transmitted from the antenna circuit 11 to the reader/writer 2 is superimposed on the carrier. Further, the modulation/demodulation circuit 131 performs demodulation processing for extracting data from the modulated wave outputted from the reader/writer 2.
CPU 132以將從記憶體133讀出之資料送出至讀寫器2之方式控制調變/解調電路131，又，進行將被調變/解調電路131解調後之資料寫入至記憶體133之處理。The CPU 132 controls the modulation/demodulation circuit 131 in such a manner that the data read from the memory 133 is sent to the reader/writer 2, and the data demodulated by the modulation/demodulation circuit 131 is written to the memory. Processing of body 133.
在與具有上述構成之天線模組1進行通訊之讀寫器2，天線2a具備天線線圈21與電容器22，控制基板2b具備調變/解調電路23、CPU 24、及記憶體25。In the reader/writer 2 that communicates with the antenna module 1 having the above configuration, the antenna 2a includes an antenna coil 21 and a capacitor 22. The control board 2b includes a modulation/demodulation circuit 23, a CPU 24, and a memory 25.
天線線圈21係例如形成為矩形，藉由與天線模組1側之天線線圈11a磁耦合，收發指令或寫入資料等各種資料，再者，供應在天線模組1使用之電力。The antenna coil 21 is formed in a rectangular shape, for example, and is magnetically coupled to the antenna coil 11a on the antenna module 1 side, and transmits and receives various data such as commands and data, and supplies power to the antenna module 1.
電容器22與天線線圈21連接構成諧振電路。調變/解調電路23進行產生使從讀寫器2送出至天線模組1之資料重疊於載波之調變波之調變處理。又，調變/解調電路23進行從天線模組1所送出之調變波取出資料之解調處理。The capacitor 22 is connected to the antenna coil 21 to constitute a resonant circuit. The modulation/demodulation circuit 23 performs a modulation process for generating a modulated wave in which data transmitted from the reader/writer 2 to the antenna module 1 is superimposed on a carrier wave. Further, the modulation/demodulation circuit 23 performs demodulation processing of extracting data from the modulated wave transmitted from the antenna module 1.
CPU 24控制調變/解調電路23，以將從記憶體25讀出之資料送出至天線模組1，又，進行將以調變/解調電路23解調之資料寫入記憶體25之處理。The CPU 24 controls the modulation/demodulation circuit 23 to send the data read from the memory 25 to the antenna module 1, and writes the data demodulated by the modulation/demodulation circuit 23 into the memory 25. deal with.
天線模組1之天線電路11，從實現穩定通訊之觀點而言，以天線電路11之諧振頻率與讀寫器2之振盪頻率一致之方式，調整天線線圈11a之電感L及電容器11b之電容C。The antenna circuit 11 of the antenna module 1 adjusts the inductance L of the antenna coil 11a and the capacitance C of the capacitor 11b in such a manner that the resonance frequency of the antenna circuit 11 coincides with the oscillation frequency of the reader/writer 2 from the viewpoint of achieving stable communication. .
(溫度補償)(Temperature compensation)
如上述構成之天線模組1，從防止天線電路11之諧振頻率隨著使用溫度區域之溫度變化偏移之觀點而言，著眼於藉由與溫度變化對應之導電性材料之伸縮使線圈之大小變化，藉此使天線線圈11a之電感L變化之特性，磁性片12具有下述特性。The antenna module 1 configured as described above focuses on the size of the coil by the expansion and contraction of the conductive material corresponding to the temperature change from the viewpoint of preventing the resonance frequency of the antenna circuit 11 from shifting with the temperature change of the use temperature region. The magnetic sheet 12 has the following characteristics by changing the characteristics of the inductance L of the antenna coil 11a.
亦即，磁性片12係由以與使用溫度區域之溫度變化所伴隨之天線線圈11a之電感之變化成為相反特性之方式使天線線圈11a之電感變化且在使用溫度區域使天線電路11之諧振頻率與讀寫器2之振盪頻率大致一致之溫度特性之磁性材料構成。That is, the magnetic sheet 12 changes the inductance of the antenna coil 11a in such a manner as to have an opposite characteristic to the change in the inductance of the antenna coil 11a accompanying the temperature change in the temperature region of use, and causes the resonance frequency of the antenna circuit 11 in the use temperature region. It is composed of a magnetic material having a temperature characteristic substantially identical to the oscillation frequency of the reader/writer 2.
作為具體例，本實施形態中，天線線圈11a之匝數為3至10，具有在天線電路11之諧振頻率即13.56MHz之電感之變化單調遞增之特性。相對此種天線線圈11a之溫度特性，磁性片12具有在20℃±5℃以上天線線圈11a之電感隨著溫度變化單調遞減之特性。此外，磁性片12與上述天線線圈11a，以接合距離從10μm成為255μm之方式接近配置，藉此，藉由與磁性片12之溫度特性對應之天線線圈11a之電感之變化使與溫度變化對應之天線線圈11a之電感之單調遞增抵銷。As a specific example, in the present embodiment, the number of turns of the antenna coil 11a is 3 to 10, and the change in inductance of the resonant frequency of the antenna circuit 11, that is, 13.56 MHz, is monotonously increasing. With respect to the temperature characteristics of the antenna coil 11a, the magnetic sheet 12 has a characteristic that the inductance of the antenna coil 11a monotonously decreases with temperature change at 20 ° C ± 5 ° C or higher. Further, the magnetic sheet 12 and the antenna coil 11a are arranged close to each other such that the bonding distance is from 10 μm to 255 μm, whereby the change in the inductance of the antenna coil 11a corresponding to the temperature characteristic of the magnetic sheet 12 corresponds to the temperature change. The inductance of the antenna coil 11a is monotonically increasing offset.
磁性片12只要為實現上述溫度補償之磁性材料即可，但作為磁性材料使用μ’較高之肥粒鐵之情形，具有使天線線圈11a之電感如圖3所示以隨著溫度變化出現2個峰值之方式變化之溫度特性。The magnetic sheet 12 may be a magnetic material that realizes the above-described temperature compensation. However, when the magnetic material is used as a magnetic material, the inductance of the antenna coil 11a is as shown in FIG. The temperature characteristics of the peak change mode.
例如，在使用溫度區域為-20℃至60℃之情形，設第二個出現之峰值(以下，稱為二次峰值)之溫度為-20℃至20℃，在溫度較該二次峰值高之區域，為了抵銷與溫度變化對應之天線線圈11a之電感之單調遞增特性，磁性片12，較佳為，使用下述組成者。For example, in the case where the temperature range is -20 ° C to 60 ° C, the temperature at which the second peak appears (hereinafter, referred to as the secondary peak) is -20 ° C to 20 ° C, and the temperature is higher than the secondary peak. In order to offset the monotonously increasing characteristic of the inductance of the antenna coil 11a corresponding to the temperature change, the magnetic sheet 12 is preferably composed of the following components.
亦即，磁性片12為在Ni-Zn-Cu系之磁性材料含有Sb氧化物與Co氧化物之肥粒鐵，且進一步滿足下述條件。此處，磁性片12含有換算為Sb2O3後0.7重量%至1.25重量%之Sb氧化物、換算為CoO後0至0.2重量%之Co氧化物。In other words, the magnetic sheet 12 is a ferrite iron containing a Sb oxide and a Co oxide in a Ni-Zn-Cu-based magnetic material, and further satisfies the following conditions. Here, the magnetic sheet 12 contains Sb oxide in an amount of 0.7% by weight to 1.25% by weight in terms of Sb 2 O 3 and 0 to 0.2% by weight of Co oxide in terms of CoO.
以上述方式，天線模組1，藉由與磁性片12之溫度特性對應之天線線圈11a之電感之變化使與溫度變化對應之天線線圈11a之電感之變化導致之諧振頻率之變化抵銷。藉此，天線模組1，由於未以電路對策進行頻率修正處理，因此不使裝置整體之空間變大，即使溫度在預先設定之使用溫度區域變化亦可將諧振頻率維持成大致一定而穩定地進行通訊。In the above manner, the antenna module 1 cancels the change in the resonance frequency caused by the change in the inductance of the antenna coil 11a corresponding to the temperature change by the change in the inductance of the antenna coil 11a corresponding to the temperature characteristic of the magnetic piece 12. In this way, since the antenna module 1 does not perform the frequency correction processing by the circuit countermeasure, the space of the entire device is not increased, and the resonance frequency can be maintained substantially constant and stably even if the temperature is changed in the predetermined use temperature region. Communicate.
(實施例1)(Example 1)
作為組裝於行動電話等之天線模組之具體例使用如下所示者。亦即，天線線圈11a，使用藉由在圖4A所示之外形尺寸36[mm]×29[mm]、厚度0.09[mm]之可撓性印刷基板11c進行圖案化處理製作者。又，磁性片12，使用在圖4B所示之外形尺寸36[mm]×29[mm]、在13.56MHz之頻率μ’=119、μ’’=1.33之肥粒鐵。又，製作天線線圈11a之可撓性印刷基板11c與磁性片12係透過作為黏著劑厚度為0.3mm之丙烯酸系ADH片接合。As a specific example of an antenna module incorporated in a mobile phone or the like, the following is used. In other words, the antenna coil 11a is produced by patterning using the flexible printed circuit board 11c having a size of 36 [mm] × 29 [mm] and a thickness of 0.09 [mm] as shown in Fig. 4A. Further, as the magnetic sheet 12, the ferrite iron having a shape size of 36 [mm] × 29 [mm] shown in Fig. 4B and a frequency of μ' = 119 and μ'' = 1.33 at 13.56 MHz was used. Further, the flexible printed circuit board 11c on which the antenna coil 11a is formed and the magnetic sheet 12 are bonded to each other through an acrylic ADH sheet having an adhesive thickness of 0.3 mm.
首先，圖5係顯示對未接合磁性片12之可撓性印刷基板11c單體中、設匝數分別為3、5、10且以Cu為導線時之各天線線圈11a之電感之溫度特性進行測定之結果。此圖5中，顯示相對以橫軸為溫度且以縱軸為設計中心之20℃時之電感L20之溫度變化所伴隨之電感Lx之差分之比率(Lx-L20)×100/L20之值。此外，圖5之例之「3t」、「5t」、「10t」係分別表示天線線圈11a之匝數為3、5、10。First, FIG. 5 shows the temperature characteristics of the inductance of each antenna coil 11a in the case where the number of turns is 3, 5, and 10, and the number of turns is 3, 5, and 10, respectively, in the flexible printed circuit board 11c to which the magnetic sheet 12 is not bonded. The result of the measurement. In FIG. 5, the ratio (Lx - L20) × 100 / L20 of the difference of the inductance Lx accompanying the temperature change of the inductance L20 at 20 ° C with the horizontal axis as the temperature and the design center is shown. Further, "3t", "5t", and "10t" in the example of Fig. 5 indicate that the number of turns of the antenna coil 11a is 3, 5, and 10, respectively.
如圖5所示，3種天線線圈11a之電感皆對應溫度變化而單調遞增。尤其是3種天線線圈11a之中、匝數多之天線模組之電感對溫度之變化較大。其原因在於，天線線圈11a之導線即Cu之線膨脹係數α為16.5較大，圖案長度相對溫度變化導致天線線圈11a之面積S變化，以L=AN2S表示之電感L變化。此處，A表示比例係數，N表示匝數。As shown in FIG. 5, the inductances of the three types of antenna coils 11a are monotonically increasing corresponding to temperature changes. In particular, among the three types of antenna coils 11a, the inductance of the antenna module having a large number of turns has a large change in temperature. The reason for this is that the linear expansion coefficient α of the wire of the antenna coil 11a, that is, Cu, is 16.5, and the change in the pattern length with respect to temperature causes the area S of the antenna coil 11a to change, and the inductance L indicated by L=AN 2 S changes. Here, A denotes a proportional coefficient, and N denotes a number of turns.
接著，磁性片12，由於以單體無法測定電感，因此製作例如將磁性片12之磁性材料加工成圖6A所示之內徑3mm±0.03mm、外徑7mm±0.03mm、厚度0.1mm±0.01mm之環狀之環4，如圖6B所示，在此環4捲繞導線5，測定13.56MHz之訊號流至導線時之電感。以此方式測定之電感，可作為磁性材料之特性值評估。Next, in the magnetic sheet 12, since the inductance cannot be measured by the single body, for example, the magnetic material of the magnetic sheet 12 is processed to have an inner diameter of 3 mm ± 0.03 mm, an outer diameter of 7 mm ± 0.03 mm, and a thickness of 0.1 mm ± 0.01 as shown in Fig. 6A. The annular ring 4 of mm, as shown in Fig. 6B, is wound around the wire 4 in this ring 4 to measure the inductance of the 13.56 MHz signal flowing to the wire. The inductance measured in this way can be evaluated as the characteristic value of the magnetic material.
為了利用使用上述環之測定對天線線圈11a之電感進行溫度補償，使用作為具體例顯示於圖7之溫度特性之磁性材料，該具體例為在Ni-Zn-Cu系之磁性材料含有Sb氧化物與Co氧化物之肥粒鐵。本實施例之磁性片，使用含有換算為Sb2O3後1.2重量%之Sb氧化物、換算為CoO後0.2重量%之Co氧化物之肥粒鐵。此為滿足上述含有換算為Sb2O3後0.7重量%至1.25重量%之Sb氧化物、換算為CoO後0至0.2重量%之Co氧化物之條件之一例。亦即，使用圖7所示之在-10℃附近具有二次峰值且在其以上之溫度變化具有電感單調遞減之溫度特性之磁性材料KM30。此處，圖7中，顯示在上述可撓性印刷基板11c單體設匝數為10之天線線圈11a之電感之溫度特性，顯示藉由環測定相對該溫度特性將縱軸之比例尺比以1/10表示之磁性材料KM30之電感之溫度特性。In order to temperature-compensate the inductance of the antenna coil 11a by the measurement using the above-described ring, a magnetic material which is a temperature characteristic shown in FIG. 7 as a specific example is used, and the specific example is a magnetic material containing a Sb oxide in the Ni-Zn-Cu system. Grain iron with Co oxides. In the magnetic sheet of the present embodiment, a ferrite iron containing a Sb oxide in an amount of 1.2% by weight in terms of Sb 2 O 3 and a Co oxide in an amount of 0.2% by weight in terms of CoO was used. This is an example of a condition that satisfies the above-mentioned Sb oxide in an amount of 0.7% by weight to 1.25% by weight in terms of Sb 2 O 3 and 0 to 0.2% by weight of Co oxide in terms of CoO. That is, the magnetic material KM30 having a secondary peak at -10 ° C in the vicinity of -10 ° C and having a temperature characteristic in which the inductance monotonically decreases is shown in FIG. 7 is used. Here, in FIG. 7, the temperature characteristic of the inductance of the antenna coil 11a in which the number of turns of the flexible printed circuit board 11c is 10 is shown, and the ratio of the scale of the vertical axis with respect to the temperature characteristic is shown by the ring. /10 indicates the temperature characteristic of the inductance of the magnetic material KM30.
該實施例之天線模組1，使由上述磁性材料KM30構成之磁性片12透過厚度0.3mm之ADH片與製作有上述匝數為10之天線線圈11a之可撓性印刷基板11c接合，如圖8所示，在至少-10℃至40℃之溫度區域，能將天線線圈11a之電感保持成一定。In the antenna module 1 of the embodiment, the magnetic sheet 12 composed of the magnetic material KM30 is passed through an ADH sheet having a thickness of 0.3 mm and the flexible printed circuit board 11c having the antenna coil 11a having the number of turns of 10, as shown in the figure. As shown in Fig. 8, the inductance of the antenna coil 11a can be kept constant in a temperature range of at least -10 ° C to 40 ° C.
圖8中，作為實測值(KM30)與和實測值(KM30)大致一致之計算值顯示下述2個計算值。亦即，此等計算值為對圖7所示之使用環之特性值即計算值作為對FPC(單體)之實測值之助長率加權13%、11.5%而加上後之計算值。從此圖8可知，磁性片12，約11.5%~13%程度對天線線圈11a之電感之溫度特性造成影響。從此結果可知，利用使用環之特性值，可評估對天線線圈11a之電感之溫度補償之程度，能容易實現電感之溫度特性大致一致之設計。In Fig. 8, the calculated values which are substantially the same as the measured value (KM30) and the measured value (KM30) indicate the following two calculated values. That is, these calculated values are calculated by adding the characteristic value of the ring used in FIG. 7 , that is, the calculated value, to the growth rate of the measured value of the FPC (single) by 13% and 11.5%. As can be seen from Fig. 8, the magnetic sheet 12 has an influence on the temperature characteristics of the inductance of the antenna coil 11a by about 11.5% to 13%. From this result, it is understood that the degree of temperature compensation for the inductance of the antenna coil 11a can be evaluated by using the characteristic value of the ring, and the design in which the temperature characteristics of the inductance are substantially uniform can be easily realized.
此外，二次峰值為-20℃程度，在該二次峰值以上之溫度到60℃附近為止具有電感單調遞減之溫度特性之肥粒鐵之磁性片12，可藉由在上述Ni-Zn-Cu系之磁性材料以既定條件含有Sb氧化物與Co氧化物來實現，因此在-20℃至60℃之溫度區域，能將天線線圈11a之電感保持成一定。Further, the secondary peak is about -20 ° C, and the magnetic sheet 12 having the temperature characteristic of the monotonously decreasing inductance of the ferrite-grained iron having a temperature higher than the secondary peak to around 60 ° C can be obtained by the above Ni-Zn-Cu Since the magnetic material is obtained by containing Sb oxide and Co oxide under predetermined conditions, the inductance of the antenna coil 11a can be kept constant in a temperature range of -20 ° C to 60 ° C.
此處，如圖9所示，針對藉由改變ADH片11d之厚度使磁性片12與天線線圈11a之接合距離變化時之電感之變化進行說明。此圖9係顯示天線模組1之剖面形狀之圖，設可撓性印刷基板11c與ADH片11d之厚度之合計值為a、ADH11d之厚度為b。Here, as shown in FIG. 9, the change in inductance when the bonding distance between the magnetic sheet 12 and the antenna coil 11a is changed by changing the thickness of the ADH sheet 11d will be described. 9 is a view showing a cross-sectional shape of the antenna module 1. The total thickness of the flexible printed circuit board 11c and the ADH sheet 11d is a, and the thickness of the ADH11d is b.
圖10係顯示使ADH片11d之厚度b變化時之電感之變化之圖，從此圖10可知，若磁性片12與天線線圈11a之接合距離變長，則電感單調遞減，相反地若此接合距離短則天線線圈11a產生之磁通強烈受到磁性片12之影響，因此電感變高。具體而言，若設厚度b為變數x，則電感之近似函數y係以y=-0.0015x+3.1622表示。此時，相關係數R之平方R2為0.9938。Fig. 10 is a view showing a change in inductance when the thickness b of the ADH sheet 11d is changed. From Fig. 10, it can be seen that if the bonding distance between the magnetic sheet 12 and the antenna coil 11a becomes long, the inductance monotonously decreases, and conversely if the joint distance Shortly, the magnetic flux generated by the antenna coil 11a is strongly affected by the magnetic sheet 12, so that the inductance becomes high. Specifically, if the thickness b is a variable x, the approximate function y of the inductance is expressed by y=-0.0015x+3.1622. At this time, the square R 2 of the correlation coefficient R is 0.9938.
又，圖11A係顯示在至少-10℃至40℃之溫度區域，在以將天線線圈11a之電感保持成一定之方式使磁性片12與可撓性印刷基板接合之狀態下，設可撓性印刷基板11c與ADH片11d之厚度之合計值a為255μm、155μm、55μm之各天線線圈11a之電感之溫度特性。Further, Fig. 11A shows that in a temperature range of at least -10 ° C to 40 ° C, flexibility is provided in a state where the magnetic sheet 12 is bonded to the flexible printed circuit board in such a manner that the inductance of the antenna coil 11a is kept constant. The total value a of the thicknesses of the printed circuit board 11c and the ADH sheet 11d is the temperature characteristic of the inductance of each of the antenna coils 11a of 255 μm, 155 μm, and 55 μm.
從此圖11A可知，磁性片12與天線線圈11a之分離距離愈短，則電感之溫度變化特性有變大之傾向。As can be seen from Fig. 11A, the shorter the separation distance between the magnetic sheet 12 and the antenna coil 11a, the more the temperature change characteristic of the inductance tends to become larger.
如上述，天線模組1，藉由調整磁性片12與天線線圈11a之分離距離，可調整在使用溫度區域之上下限值容許之電感之溫度特性導致之變化。As described above, by adjusting the separation distance between the magnetic piece 12 and the antenna coil 11a, the antenna module 1 can adjust the change in the temperature characteristic of the inductance allowed by the lower limit value above the use temperature region.
又，圖11B係顯示在設上述厚度之合計值a為255μm之條件下，使用由本實施例之磁性材料KM30構成之磁性片12之電感之溫度變化特性與作為比較例使用由圖13所示之磁性材料KM11構成之磁性片之電感之溫度變化特性。In addition, FIG. 11B shows that the temperature change characteristic of the inductance of the magnetic sheet 12 composed of the magnetic material KM30 of the present embodiment is used under the condition that the total value a of the thicknesses is 255 μm, and the comparative example is used as shown in FIG. The temperature change characteristic of the inductance of the magnetic piece formed by the magnetic material KM11.
再者，圖11C係顯示在設上述厚度之合計值a為55μm之條件下，使用由本實施例之磁性材料KM30構成之磁性片12之電感之溫度變化特性與作為比較例使用由圖13所示之磁性材料KM11構成之磁性片之電感之溫度變化特性。In addition, FIG. 11C shows that the temperature change characteristic of the inductance of the magnetic sheet 12 composed of the magnetic material KM30 of the present embodiment is used under the condition that the total thickness a of the above thickness is 55 μm, and is used as a comparative example as shown in FIG. The temperature change characteristic of the inductance of the magnetic piece formed by the magnetic material KM11.
從此等圖11B及圖11C可知，例如，相對於使用由磁性材料KM11構成之磁性片之習知例，本實施例之天線模組1可抑制起因於磁性片12與天線線圈11a之分離距離變短而有變大傾向之電感之溫度變化特性。As can be seen from FIG. 11B and FIG. 11C, for example, the antenna module 1 of the present embodiment can suppress the separation distance caused by the magnetic sheet 12 and the antenna coil 11a from being changed with respect to the conventional example using the magnetic sheet composed of the magnetic material KM11. The temperature variation characteristic of the inductor that is short and has a tendency to become large.
1．．．天線模組1. . . Antenna module
2．．．讀寫器2. . . Reader
2a．．．天線2a. . . antenna
2b．．．控制基板2b. . . Control substrate
3．．．筐體3. . . Casing
11．．．天線電路11. . . Antenna circuit
11a．．．天線線圈11a. . . Antenna coil
11b．．．電容器11b. . . Capacitor
11c．．．可撓性印刷基板11c. . . Flexible printed circuit board
11d．．．ADH片11d. . . ADH film
12．．．磁性片12. . . Magnetic sheet
13．．．通訊處理部13. . . Communication processing department
21．．．天線線圈twenty one. . . Antenna coil
22．．．電容器twenty two. . . Capacitor
23．．．調變/解調電路twenty three. . . Modulation/demodulation circuit
24．．．CPUtwenty four. . . CPU
25．．．記憶體25. . . Memory
100．．．無線通訊系統100. . . Wireless communication system
131．．．調變/解調電路131. . . Modulation/demodulation circuit
132．．．CPU132. . . CPU
133．．．記憶體133. . . Memory
圖1係顯示無線通訊系統之整體構成的圖。1 is a diagram showing the overall configuration of a wireless communication system.
圖2係顯示無線通訊系統之電路構成的圖。2 is a diagram showing the circuit configuration of a wireless communication system.
圖3係用以對肥粒鐵製之磁性片之溫度特性進行說明的圖。Fig. 3 is a view for explaining the temperature characteristics of a magnetic piece made of ferrite iron.
圖4A及圖4B係用以對實施例之天線模組1之外形形狀進行說明的圖。4A and 4B are views for explaining the outer shape of the antenna module 1 of the embodiment.
圖5係顯示相對以橫軸為溫度且以縱軸為設計中心之20℃時之電感L20之溫度變化所伴隨之電感Lx之差分之比率(Lx-L20)×100/L20之值的圖。Fig. 5 is a graph showing the ratio (Lx - L20) × 100 / L20 of the difference of the inductance Lx due to the temperature change of the inductance L20 at 20 ° C with the horizontal axis as the temperature and the vertical axis as the design center.
圖6A及圖6B係用以對使用加工成環狀之環之磁性片之磁氣特性之測定進行說明的圖。6A and 6B are views for explaining measurement of magnetic gas characteristics using a magnetic sheet processed into a ring shape.
圖7係用以對在Ni-Zn-Cu系之磁性材料含有Sb氧化物與Co氧化物之肥粒鐵之磁氣特性進行說明的圖。Fig. 7 is a view for explaining magnetic characteristics of ferrite iron containing Sb oxide and Co oxide in a Ni-Zn-Cu-based magnetic material.
圖8係用以對本實施形態之天線線圈之電感之溫度特性進行說明的圖。Fig. 8 is a view for explaining the temperature characteristics of the inductance of the antenna coil of the embodiment.
圖9係用以對實施例之天線模組之剖面形狀進行說明的圖。Fig. 9 is a view for explaining a sectional shape of an antenna module of the embodiment.
圖10係顯示使ADH片之厚度變化時之電感之變化的圖。Fig. 10 is a graph showing changes in inductance when the thickness of the ADH sheet is changed.
圖11A至圖11C係依據可撓性印刷基板與ADH片之厚度之合計值之變化說明天線線圈之電感之溫度特性的圖。11A to 11C are diagrams for explaining the temperature characteristics of the inductance of the antenna coil in accordance with the change in the total value of the thicknesses of the flexible printed circuit board and the ADH sheet.
圖12係用以對與天線線圈接近配置之磁性片之功能進行說明的圖。Fig. 12 is a view for explaining a function of a magnetic piece disposed close to an antenna coil.
圖13係顯示相對以橫軸為溫度且以縱軸為設計中心之一例而設定之20℃時之電感L20之溫度變化所伴隨之電感Lx之差分之比率(Lx-L20)×100/L20之值的圖。Fig. 13 is a graph showing the ratio of the difference (Lx-L20) × 100 / L20 of the inductance Lx accompanying the temperature change of the inductance L20 at 20 ° C with respect to the temperature on the horizontal axis and the design center as the design center. The map of values.
1．．．天線模組1. . . Antenna module
2．．．讀寫器2. . . Reader
2a．．．天線2a. . . antenna
2b．．．控制基板2b. . . Control substrate
3．．．筐體3. . . Casing
11．．．天線電路11. . . Antenna circuit
11a．．．天線線圈11a. . . Antenna coil
11b．．．電容器11b. . . Capacitor
12．．．磁性片12. . . Magnetic sheet
13．．．通訊處理部13. . . Communication processing department
100．．．無線通訊系統100. . . Wireless communication system
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010268395A JP5162648B2 (en) | 2010-12-01 | 2010-12-01 | ANTENNA DEVICE AND COMMUNICATION DEVICE |
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| TWI523335B true TWI523335B (en) | 2016-02-21 |
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| US (1) | US9082545B2 (en) |
| JP (1) | JP5162648B2 (en) |
| KR (1) | KR20130141346A (en) |
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| HK (1) | HK1179419A1 (en) |
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| WO (1) | WO2012073704A1 (en) |
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2010
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2011
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- 2011-11-16 WO PCT/JP2011/076455 patent/WO2012073704A1/en active Application Filing
- 2011-11-16 CN CN201180031241.7A patent/CN102971908B/en not_active Expired - Fee Related
- 2011-11-16 KR KR1020127033690A patent/KR20130141346A/en not_active Application Discontinuation
- 2011-11-23 TW TW100142820A patent/TWI523335B/en not_active IP Right Cessation
-
2013
- 2013-05-29 HK HK13106381.9A patent/HK1179419A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012119974A (en) | 2012-06-21 |
| US9082545B2 (en) | 2015-07-14 |
| US20130169398A1 (en) | 2013-07-04 |
| TW201228121A (en) | 2012-07-01 |
| JP5162648B2 (en) | 2013-03-13 |
| CN102971908A (en) | 2013-03-13 |
| KR20130141346A (en) | 2013-12-26 |
| HK1179419A1 (en) | 2013-09-27 |
| WO2012073704A1 (en) | 2012-06-07 |
| CN102971908B (en) | 2016-03-23 |
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Legal Events
| Date | Code | Title | Description |
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| MM4A | Annulment or lapse of patent due to non-payment of fees |